When can I plant Asters in Zone 7a

The USDA Zone info is a great tool for gardeners to help us figure out our gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for our area.

The USDA zone info for Zone 7a can be read to determine when it's the best time to plant asters.


Planting Calendar for Asters

Frost tolerance for asters: Tolerant of some frost.
When you should plant them: Up to 5 weeks before last frost.

You can plant asters a little bit earlier in the year because they are one of those plants that can tolerate a little bit of cold weather.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
A good time to plant asters
Possibly ok, but a risky time to plant asters
Probably not a good time to plant asters

The earliest that you can plant asters in Zone 7a is February. However, you really should wait until March if you don't want to take any chances.

The last month that you can plant asters and expect a good harvest is probably September. Any later than that and your asters may not have a chance to grow to maturity. If you are starting your asters indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

In Zone 7a the average date of last frost happens on April 15. We should expect an average low temperature of 0°F in the coldest months of winter.

Since the USDA zone info for Zone 7a is just an average our actual date of last frost will vary from year to year. Half of the time in Zone 7a we get surprised by a frost after April 15 so make sure that you are prepared to protect your asters if we have a surprise late frost.

USDA Zone Info for Zone 7a

Here is the info for USDA Zone 7a.

Average Date of Last Frost (spring)April 15
Average Date of First Frost (fall)October 15
Lowest Expected Low0°F
Highest Expected Low5°F

This means that on a really cold year, the coldest it will get is 0°F. On most years you should be prepared to experience lows near 5°F.

Plants to Grow in Zone 7a

You may be interested in our other planting guides for Zone 7a.